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POLYCRASE [1 record]

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Record 1 2021-07-14

English

Subject field(s)
  • Mineralogy
  • Economic Geology
Universal entry(ies)
(Y,Ca,Ce,U,Th)(Ti,Cb,Ta)2O6
formula, see observation
DEF

A black mineral composed of titanate, columbate, and tantalate of yttrium-group metals ...

OBS

... it is isomorphous with euxenite and occurs in granite pegmatites.

OBS

Chemical formula: (Y,Ca,Ce,U,Th)(Ti,Cb,Ta)2O6

French

Domaine(s)
  • Minéralogie
  • Géologie économique
Entrée(s) universelle(s)
(Y,Ca,Ce,U,Th)(Ti,Cb,Ta)2O6
formula, see observation
CONT

Les polycrases sont brun-noir avec, en principe, une masse spécifique plus élevée [que l'euxénite.]

OBS

Formule chimique : (Y,Ca,Ce,U,Th)(Ti,Cb,Ta)2O6

Spanish

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